Display any page list in a Section. Any parent, many parents, filtered, don't care.
On the other hand, you won't be able to sort the list or add new pages to it.

Copy plugin folder into site/plugins

Run composer require rasteiner/k3-pagesdisplay-section.

You select and filter the pages with the query language, with a query property in the section yaml. You can start the query with site, page (refers to the current page), or pages (which is equal to site.pages).

Show all pages that have "Foo" in their title:

sections:
  mysection:
    headline: Foo Pages
    type: pagesdisplay
    query: site.index.filterBy(title, *=, Foo)

Show sibling pages (exclude current page):

sections:
  mysection:
    headline: Siblings
    type: pagesdisplay
    query: page.siblings(false)